Lock



I... H. GOROWIT Z.

LOCK.

APPLICATION FILED OCT. 22, I919.

' ,334=,852. Patented Mar. 23, 1920.

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LOUIS H. GOBOWITZ, OF NEW YORK, N. Y,

LOCK.

ieenssa Specification of Letters Patent.

Patented Mar. 23, 1920.

Application filed October 22, 1919. Serial No. 332,386. 4

To all whom it may concern:

Be it known that I, LOUIS H. Gonowrrz, a subject of Russia, and a resident of the city of New York, boroughof Manhattan, county of New York, and State of New York, have invented a new and Improved Look, of which the following is a full, clear, and eX- act description.

This invention relates to looks, and more particularly to a door lock having double security means or double locking means.

It is an object of my invention to provide a lock having a double security locking means whereby the lock may be actuated from the inside or from the outside; and itis a further object to provide a lock which will eflectually lock a door against passage of a person therethrough from the inside to the outside after the door has been locked on the outside thereof.

llt'is a further object of my invention to provide means to prevent the use of a chisel or jimmying tool to prise the locks parts open and force a door such as is the custom of burglars in gaining entrance through a locked door.

it is a further object to provide a lock simplified in construction and operation, comprising a few parts, inexpensive to man- 'ufacture and unlikely to get out of working order.

With the above principal objects and others. in view, the invention has relation. to the combination and arrangement of locked parts as described in this specification, and as set forth in the appended claims and portrayed inthe accompanying drawings, wherein:

Figure 1 shows a face view of the look installed on a door. the lock installed on the inside ofa room in order to ."be conveniently operated by persons going in and out of theroom when the device is not to be locked.

Fig. 2 is an end view of the lock showing the keeper and lock casing with the bolts thereof associated with: the keeper.

Fig. 3 is a sectional view taken 'on the line 3-3 of Fig.1.

lFig. 4 is an inside view of the lock with the cover plate removed to expose working parts. This view shows the'lock in normal working position, or such position as will enable a person to leave the room without This view illustrates expose inside working parts. This view discloses the setting of the lock parts when said device has been locked from the outside to prevent any one from leaving the room or entering the room.

Fig. 6 shows a sectional view taken through the lock casing and parts to disclose the relation between the lock bolts and a pair of independently operated bolt actuators.

Fig. 7 shows a perspective view of one of the bolt actuators.

A look constructed in accordance with the plans of my invention comprises a casing which may bebolted on the door or other structure to-be opened. The casing is provided with a pair of bolts correlated with a spring so arranged that said spring nor- .mally holds one bolt open and normally holds the other bolt closed. The lock casing 1s provided with a turn-knob on which is fitted. a bolt actuator, and this bolt actuator the door when the device is locked-from the outside by a key and prevents any one, who may enter the room from an openin other than the door, from leavingthe room t rough said door equipped with this lock. The lock is also made with an over-lapping keeper and casing which efi'ectually prevents a prising tool from being inserted between the parts to loosen same.

In presenting a, more detailed description of my invention, there is-pointed out a lock casing 10 in which the working parts are mounted, and a cover plate 11. The cover plate 11 may be removed for inspection of parts which leavesrthe views displayed in Figs. 4: and 5. The casing. 10 has an off-set 12 as shown in several views of the drawing. The lock is installed on a door with the olfset 12 placed somewhat beyond the closing edge of. the door so as to over-lap the adj a cent edge of the wall structure. A keeper 14 has an off-set corresponding to the off-set 12 of the lock casing, and'the keeper is lapped oiler and acts as a stop or abutment against which the lock casing. 10 lies when the door is closed. This structure is brought out in Fig. 3. The keeper is made with an arcuate contact face or cam 15-which acts to lift a bolt when the door is closed as later seen. The keeper is likewise provided with an opening into which the bolts lockably engage when the'door is closed.

A pair of bolts 17 and 18 are pivotally mounted on fulcrums 19 fixed to the casing. The bolts are pivoted in the casing with the outer hook-ends 2O projecting outside of the casing. The inner end of each bolt is cam shaped to provide a working surface to cooperate with a bolt actuator. A spring 21 is fixed to a lug centrally disposed between the bolts and made integral with the casing pin. The one end of'the spring 21 engages the bolt 17 forward of the fulcrum 19, while .the other end of the spring engages the other bolt 18 to the rear of the fulcrum 19. This arrangement causes the pressure of the spring 21 to hold the hook-end of the bolt 17 away from. the center of the lock casing, while the hook end of the bolt 18 is held toward the center of the casing; that is to say the bolt 17 has a force continuously exerted thereagainst to keep its hook-end in outwardly limited position, while the bolt 18 is normally held inwardly. The bolts move back and forth in a slot 22 formed in the wall of the-lock casing 10. v

- -A knob 24' is pivotally confined on the casing and has a bolt actuator 25 fixed thereto. When the knob 24 is turned the bolt locked in the keeper 14 due to the pressure of the spring 21 behind the fulcrum 19 caus- .ing the hook-end 20 to register in the keeper 14. In this manner the door isheld. locked against entrance from the outside unless the party on the outside is provided with a key. When-however the. party on the inside Wishes to open the door he will do so by rotating the knob 24 which causes the cam sha ed end 26 to lift up on the inner end of t e bolt 18 and disengage 'the hookend from the keeper 14. In Fig. 4 it is seen how the cam 26 has engaged the inner end of the bolt 18 to make ready .to push the bolt 18 against the pressure of the spring 21 to disengage the hook-end 20 of said bolt 18 from the keeper 14. In Fig. 5 it is seen how the knob 24 has been rotated through 180 degrees to change the position of the ends oft-he bolt actuator 25 so that the end of the bolt will engage a notch 28 formed in the bolt 17. Simultaneously with open the, door.

inner end of the bolt 18, and thus the bolt actuator assumes a propped and locked position in relation to the bolts 17 and 18 so that the bolts 17 and 18 cannot be prised apart under any circumstances. When the knob 24 rotates through 180 degrees as before mentioned, the pressure of the spring 21 is overcome by the force exerted through the knob so that the bolt 17 moves downwardly into the position shown in Fig. 5.

Another bolt actuator 31 is pivotally mounted on the cover plate 11 on the same axis with the first named bolt actuator '25. The actuator .31 is fitted with a turn head 32. A cylinder lock 33 is mounted in the door and held by any suitable means. The cylinder lock 33 has the usual key opening 34 into which a key is inserted for rotating the key plug and operating the look. This cylinder lock may be of any appropriate de- I sign such as is now used in conventional looks. A coupler 35 is fixed in the key plug ,made in the form of a fork so that it reaches over the turn head 32 to rotate same after the key plug 33 has been revolved a partial revolution. When the key plug 33 is rotated sufficiently far the coupler 35 takes hold ofthe turn head 32 and turns the bolt actuator. 31.

The bolt actuator 31 is of the same design, contour, and size as the originally described bolt actuator 25, and functions similarly to the bolt actuator .25. The actuator 31 is operated through the outside of the key tumbler 33, while the actuator 25 is operated through the inside of the door through the agency of the turn knob 34.

Each actuator 31 and 25 is confined between the inner endsof the bolts 17 and 18. The Figs. 4 and 5 are obtainedby removing the cover plate 11, and this removes the actuator 31, therefore *the Figs. 4 and 5 do 'not dis;

close the actuator 31, but show only the actuator '25. The Figs. 3 and 6 show both actuators 31 and 25 in position. When the actuator 25 assumes the position shown in Fig. 5, bothbolts 17 and 18 are brought into,

locked and closed position within the keeper 14. The actuator 25 therefore assumes a propped and locked position to prevent the manipulation of the bolts 17 and 18, and .the actuator 31 may be rotated at will by a key used on-the outside of the door, but will manipulation, picks, or opening by a person on the outside thereof even though the person does have a key when the knob 24 is. adjusted to bring the actuator 25 into The lock is immune from i position shown in Fig. 5. Therefore the lock provides a very dependable safeguard against entrance by reprehensible persons even though the persons are provided with a pass key or any other key which will open the door. The lock is therefore valuable for apartment houses in order to keep janitors and care takers out of ones premises. On leaving the room the knob 24; is rotated until both bolts- 17 and 18 are with- Y 1 drawn from. the "keeper 14 which admits the opening of the door. The person leaving the room may then look the door by inserting his key in the key tumbler-33 and rotating the actuator 31. untilit assumes a propped and locked position between the inner ends of the bolts 17 and 18 similarly and to the same effect as the actuator 25 functions in Fig. 5. When the door is thus locked from the outside, the door. cannot be unlocked from the inside because the continuous turning of the knob 24 to rotate the actuator 25 will not affect the lock in any way. For example should a burglar enter a,

room through a window he could not make his escape through the door equipped with this look and have to leave the room through the window for turning the knob 24 wouldnot unlock the lock and open the door. In

some cases this traps the burglar because they often make their escape by leadingthe police through a room and locking-out the police thus making good their escape, but the case would be different if the burglar entered a room the door of which was equipped with this look, as he would be virtually locked within the room'and could not make his egress unlessthrough the same opening through which he entered.

. slidable back and forth in a slot cut in the A look button 37 may be provided on the lock casing, and the button carries a head 38 lock casing. The bolt 18 is provided with a groove 39 engageable by the head 38. In thismanner the'bolt 18 may belocked down.

by slidingthe button'37 forward along the slot to push the head 38 upwardly into the groove 39. The bolt 1.8 may beheld open when considerable passmg' is goingon through the door. This will permit a person to enter or-leave the room without the necessi-ty of using his key. This action is brought about by forcibly holding the bolt 18 .against the pressure of the spring 21. p

This form of lock is presented to fulfil the advantages and needs felt for a dependable, lock having the characterlstics and advantages as hereinbefore described.v

Having thus described my invention, what lclaim as new anddesireto'secure by Let? tors Patent is:

1. A lock comprising, a casing, a-pair'of bolts fulcrumed in the casing, a keeper, a hook-end'formed on each bolt to engage the keeper, a spring associated with the bolts to normally engage one bolt with the keeper and normally retain the other boltout of engagement with said keeper, and a bolt actuator device associated with the bolts to engage .Said normally disengaged bolt with the keeper so that one or both bolts may be engaged with the keeper.

2. A look comprising, a casing, a pair of bolts carried in the casing, a keeper adapted to be engaged. by one or both of said bolts, and an actuator device associated with the bolts to hold both bolts in engagement with the keeper. l

y 3. A look comprising, a casing, pair of. bolts carried in the casing, a keeper, a hookend formed on each bolt to engage the keeper, and abolt actuator device interposed between the bolts to hold both of the hookends with the keeper. i

4. A look comprising,-a casing, a pair of bolts carried therein, a keeper adapted to be lockably engaged by the bolts, a device so related with the bolts that it may be manipu-- lated to engage the bolts with the keeper, and a means provided to normally keep one bolt locked with the keeper and the other bolt unlocked from the keeper when the device is moved out of engagement from both bolts.

5. A look for locking doors comprising, a

casing, a pair of bolts fulcrumed in the casmg, a eeper, a spring associated with the bolts .such that onebolt is normally locked and the other bolt is normally unlocked from the keeper, and a bolt actuator means for dogging both liilts in locking position.

6. A look for doors comprising, a casing,

a pair of bolts fulcrumed in the casing, a

keeper, a spring associated with the boltssuch that one'bolt is normally held in operative position and the other bolt is pormally held in inoperative positlon, and a bolt actuator means for dogging both bolts v into the keeper, a second named bolt actuator associated with the bolts, and a means assopoint, an actuator associated with the bolts for manipulating same from one side of the lock, and a second named actuator associated with the bolts for manipulatingthe bolts from the ,other side of the lock.

. LOUIS H. eonowrra ciated with the second named boltactuator 

